Custom subject for New Order Email notification in Woocommmerce

Question

In Woocommerce I would like to set the product purchased in the "new order" email subject line, something like this: New Order - [{product_name}] ({order_number}) - {order_date}

I understand that product_name cant be used probably due to multiple products is there a way I can still do this by filtering product ordered or just allowing multiple products as not many multi orders go through.

Very new to modifying theme code but any help would be greatly appreciated.

Answer 1

The Email settings for "New Order" the subject need to be (as in your question):
New Order - [{product_name}] ({order_number}) - {order_date}

In the code bellow I replace {product_name} by the items product names (separated by a dash) as an order can have many items…

This custom function hooked in woocommerce_email_subject_new_order will do the trick:

add_filter( 'woocommerce_email_subject_new_order', 'customizing_new_order_subject', 10, 2 );
function customizing_new_order_subject( $formated_subject, $order ){
    // Get an instance of the WC_Email_New_Order object
    $email = WC()->mailer->get_emails()['WC_Email_New_Order'];
    // Get unformatted subject from settings
    $subject = $email->get_option( 'subject', $email->get_default_subject() );

    // Loop through order line items
    $product_names = array();
    foreach( $order->get_items() as $item )
        $product_names[] = $item->get_name(); // Set product names in an array

    // Set product names in a string with separators (when more than one item)
    $product_names = implode( ' - ', $product_names );

    // Replace "{product_name}" by the product name
    $subject = str_replace( '{product_name}', $product_names, $subject );

    // format and return the custom formatted subject
    return $email->format_string( $subject );
}

Code goes in function.php file of your active child theme (or active theme).

Tested and works.

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You will get something like this: